The Canadian Phytopathological Society Annual Meeting, Montréal, Quebec, 2003

Abstract

Biological control of seedling damping-off with fish emulsion derived from menhaden fish. P.A. Abbasi, K.L. Conn, R. Earl, and G. Lazarovits. Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street, London, ON N5V 4T3, Canada.

Fungitoxicity of smoke from some Ghanaian medicinal plants. R. Addai. Department of Crop Science, Faculty of Agriculture, Kwame Nkrumah University of Science and Technology, P.O. Box KS 13128, Adum, Kumasi, Ghana.

Efficacy of OxiDate^TM for control of potato storage pathogens. K.I. Al-Mughrabi. Potato Development Centre, New Brunswick Department of Agriculture, Fisheries and Aquaculture, 39 Barker Lane, Wicklow, NB E7L 3S4, Canada.

Biological control of Carthamus lanatus in Australia. G.J. Ash, N.S. Crump, A. Breen, E. Anschaw, R.O. Kennedy, J.D.I. Harper, A. Nikandrow, and D. Hailstones. Farrer Centre, Charles Sturt University, Wagga Wagga, NSW 2678, Australia; (A.N.) Orange Agricultural Institute, New South Wales (NSW) Agriculture, Forest Road, Orange, NSW 2800, Australia; and (D.H.) Elizabeth Macarthur Agricultural Institute, NSW Agriculture, Woodbridge Road, Menangle, NSW 2568, Australia.

Assessment of resistance to late blight within primitive cultivated Andigena potato lines. P. Audy, T. Somerville, and T. Mossman. Potato Research Centre, Agriculture and Agri-Food Canada, 850 Lincoln Road, P.O. Box 20280, Fredericton, NB E3B 4Z7, Canada.

Validation of impaction-type spore sampler as a tool to estimate inoculum of Uncinula necator. R. Bacon, B. Talbot, and O. Carisse. (R.B., O.C.) Horticultural Research and Development Centre, Agriculture and Agri-Food Canada, 430 Gouin Boulevard, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada; and (R.B., B.T.) Département de biologie, Université de Sherbrooke, 2500 Université Street, Sherbrooke, QC J1K 2R1, Canada.

Identification and detection of fungi associated with root rot of soybean seedling in Eastern Canada. T. Barasubiye, C.A. Lévesque, A. Tenuta, S. Rioux, K. Seifert, T.R. Anderson, and E. Cober. Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada; (A.T.) Ontario Ministry of Agriculture and Food, P.O. Box 400, Main Street, Ridgetown, ON N0P 2C0, Canada; (S.R.) Centre de recherche sur les grains, 2700 Einstein Street, Sainte-Foy, QC G1P 3W8, Canada; and (T.R.A.) Greenhouse and Processing Crops Research Centre, Agriculture and Agri-Food Canada, 2585 County Road 20, Harrow, ON N0R 1G0, Canada.

Genetic diversity between Melampsora spp., causal agents of foliar rusts. M.J. Bergeron, M. Bourassa, D.L. Joly, and R.C. Hamelin. Canadian Forest Service, Natural Resources Canada, Sainte-Foy, QC G1V 4C7, Canada.

Molecular diagnosis of Phytophthora ramorum by realtime polymerase chain reaction, using Taqman®, SybrGreen, and Molecular beacons. G. Bilodeau, C.A. Lévesque, A.W.A.M. De Cock, G. Kristjansson, J. McDonald, and R.C. Hamelin. Natural Resources Canada, QC G1V 4C7, Canada; (C.A.L.) Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada; (A.W.A.M.D.C.) Centraalbureau voor Schimmelcultures, NL-3508 AD Utrecht, Netherlands; and (G.K., J.M.) Canadian Food Inspection Agency, Ottawa, ON K2H 8P9, Canada.

Première observation du Melampsora larici-populina au Canada. M. Bourassa, L. Innes, L. Marchand, P. Frey et R.C. Hamelin. Service canadien des forêts, Ressources naturelles du Canada, Sainte-Foy, QC G1V 4C7, Canada; (L.I., L.M.) Direction de la conservation des forêts, ministère des Ressources naturelles du Québec, Sainte-Foy, QC G1P 3W8, Canada; et (P.F.) Institut national de la recherche agronomique – Nancy, Unité de pathologie forestière, 54280 Champenoux, France.

Spatial distribution of ascospores of Venturia inaequalis within the tree canopy.O. Carisse and D. Rolland. Horticultural Research and Development Centre, Agriculture and Agri-Food Canada, 430 Gouin Boulevard, Saint-Jean-sur- Richelieu, QC J3B 3E6, Canada.

Incidence of iprodione-insensitive isolates of Botrytis squamosa. O. Carisse and M. Tremblay. Horticultural Research and Development Centre, Agriculture and Agri-Food Canada, 430 Gouin Boulevard, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.

The significance of ethylene in the interaction between Nicotiana tabacum and Colletotrichum destructivum. N. Chen, P.H. Goodwin, and T. Hsiang. Department of Environmental Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.

Interactions between weakly and highly virulent strains of Leptosphaeria maculans, leading to induced resistance to black leg in canola. Y. Chen and W.G.D. Fernando. Department of Plant Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.

Optimization of geldanamycin production by Streptomyces melanosporofaciens strain EF-76, a biocontrol agent of plant diseases. N. Clermont and C. Beaulieu. Centre d’étude et de valorisation de la diversité microbienne, Département de biologie, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada.

Reduction of potato scab with volatile fatty acids and acidified liquid swine manure in soil amendments. K.L. Conn, P.A. Abbasi, Y. Lin, and G. Lazarovits. Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street, London, ON N5V 4T3, Canada.

Genetic and chemical control of Rhizoctonia solani on chickpea. E.B. Connor and R. Hall. Department of Environmental Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.

M13 DNA fragment as an external control to normalize quantification of fungal DNA from soil by real-time polymerase chain reaction. A.L. Dauch, A.K. Watson, and S.H. Jabaji-Hare. Department of Plant Science, McGill University, 21 111 Lakeshore Road, QC H9X 3V9, Canada.

A satellite double-stranded RNA in hypovirulent isolates of Sclerotinia homoeocarpa. F. Deng and G.J. Boland. Department of Environmental Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.

Effect of 1-methylcyclopropene on postharvest blue and gray molds of apples and pears. D. Errampalli. Southern Crop Protection and Food Research Centre, Vineland Station, Agriculture and Agri-Food Canada, Vineland, ON L0R 2E0, Canada.

Fusarium spp. in residues of cereal and noncereal crops grown in rotation in eastern Saskatchewan. M.R. Fernandez, P.G. Pearse, and G. Holzgang. Semiarid Prairie Agricultural Research Centre, Agriculture and Agri-Food Canada, P.O. Box 1030, Swift Current, SK S9H 3X2, Canada; and (P.G.P., G.H.) Saskatchewan Agriculture, Food and Rural Revitalization, 3085 Albert Street, Regina, SK S4S 0B1, Canada.

Impact of rotation sequence on common root rot of wheat in the Brown soil zone of western Canada. M.R. Fernandez and R.P. Zentner. Semiarid Prairie Agricultural Research Centre, Agriculture and Agri-Food Canada, P.O. Box 1030, Swift Current, SK S9H 3X2, Canada.

Temperature sensitivity of resistance genes to oat stem rust. T. Fetch. Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB R3T 2M9, Canada.

Potential role of lipid-transfer proteins in resistance to snow mould in winter wheat. D.A. Gaudet, M. Frick, S. Huang, N. Foroud, B. Puchalski, T. Despins, F. Eudes, and A. Laroche. Lethbridge Research Centre, Agriculture and Agri-Food Canada, P.O. Box 3000, Lethbridge, AB T1J 4B1, Canada.

Pathotypes of Cochliobolus sativus in Manitoba. H. Ghazvini and A. Tekauz. Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB R3T 2M9, Canada.

Persistence of Ascochyta rabiei in chickpea residue in Saskatchewan. B.D. Gossen. Saskatoon Research Centre, Agriculture and Agri-Food Canada, Saskatoon, SK S7N 0X2 Canada.

Effect of tillage management on diseases of canola in Saskatchewan. B.D. Gossen and H.R. Kutcher. Saskatoon Research Centre, Agriculture and Agri-Food Canada, Saskatoon, SK S7N 0X2, Canada.

Soluble invertase, and not invertase bound to cell wall, supplies hexose from wheat to powdery mildew. D.L. Greenshields, F. Wang, G. Selvaraj, and Y. Wei. Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK S7N 5E2, Canada; and (G.S.) Plant Biotechnology Institute, National Research Council of Canada, 110 Gymnasium Place, Saskatoon, SK S7N 0W9, Canada.

Characterization of Rhizoctonia solani infecting lettuce in Germany. R. Grosch, J.H.M. Schneider, and A. Kofoet. Institute of Vegetable and Ornamental Crops, Echtermeyer Weg 1, D-14979 Großbeeren, Germany; and (J.H.M.S.) Institute of Sugar Beet Research, P.O. Box 32, 4600 AA Bergen op Zoom, Netherlands.

Fungi associated with the European pine shoot beetle, Tomicus piniperda, in southern Ontario. G. Hausner, C.N. Davis, E.A. Gibb, J. Reid, and A.A. Hopkin. Department of Microbiology, University of Manitoba, Winnipeg, MB R3T 2N2, Canada; (C.N.D., A.A.H.) Great Lakes Forestry Centre, Canadian Forest Service, 1219 Queen Street, Sault Sainte Marie, ON P6A 2E5, Canada; and (J.R.) Senior Scholar, Department of Botany, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.

Godronia canker of lowbush blueberry. P.D. Hilderbrand, W.E. Renderos, R.J. Davies, and K.B. McRae. Atlantic Food and Horticulture Research Centre, Agriculture and Agri-Food Canada, 32 Main Street, Kentville, NS B4N 1J5, Canada.

Use of polymerase chain reaction – single–strand conformational polymorphism analysis to monitor impacts of biocontrol agents on selected microbial populations in soybean crops.R. Hogue, E. Plante, I. Larouche, R. Jeannotte, and N. Daigle. Institut de recherche et de développement en agroenvironnement, 2700, rue Einstein, Sainte-Foy, QC G1P 3W8, Canada; and (R.J.) Department of Natural Resources Sciences, Université McGill, Sainte- Anne-de-Bellevue, QC H9X 3V9, Canada.

Confirmation of the role of ascospores in field epidemics of speckled leaf blotch of wheat in Manitoba. C. Hoorne, L. Lamari, and G.M. Ballance. Department of Plant Science, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.

Effects of seeding rate, seeding depth, and seed infection on mycosphaerella blight and seed yield of field pea. S.F. Hwang, R.L. Conner, K.F. Chang, G.D. Turnbull, R.J. Howard, and S.F. Blade. Alberta Research Council, Vegreville, AB T9C 1T4, Canada; (R.L.C.) Cereal Research Centre, Agriculture and Agri-Food Canada, Morden Research Station, Unit 100–101, Route 100, Morden, MB R6M 1Y5, Canada; (K.F.C.) Food and Rural Development, Field Crop Development Centre, Alberta Agriculture, Lacombe, AB T4L 1W1, Canada; (R.J.H.) Food and Rural Development, Crop Diversification Centre South, Alberta Agriculture, Brooks AB T1R 1E6, Canada; and (S.F.B.) Food and Rural Development, Crop Diversification Centre North, Alberta Agriculture, Edmonton, AB T5J 4K3, Canada.

Effect of antagonistic fungi on the production of perithecia of Gibberella zeae on wheat residue. S. Inch and J. Gilbert. Cereal Research Centre, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, MB R3T 2M9, Canada.

Characterization of Phoma lingam isolates recovered from Canadian accessions of Thlaspi arvense. M.R. Islam, B. Koopmann, R.K. Gugel, and G. Séguin-Swartz. Institute for Plant Pathology and Plant Protection, Georg- August-Universität Göttingen Grisebachstr. 6, 37077 Göttingen, Germany; and (R.K.G., G.S.-S.) Saskatoon Research Centre, Agriculture and Agri-Food Canada, 107 Science Place, Saskatoon, SK S7N 0X2, Canada

Influence of inoculum sources on cultivar susceptibility to apple scab. T. Jobin, P. Neumann, and O. Carisse. Département des sciences biologiques, Université de Montréal, C.P. 6128, Montréal, QC H3C 3J7, Canada; and (O.C.) Horticultural Research and Development Centre, Agriculture and Agri-Food Canada, 430 Gouin Boulevard, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.

Photosynthesis, net carbon gain, and growth of hydroponic bell peppers (Capsicum annuum ‘Cubico’) following root infection by Pythium aphanidermatum. M. Johnstone, S. Chatterton, J. Sutton, and B. Grodzinski. Department of Plant Agriculture University of Guelph, Guelph, ON N1G 2W1, Canada; and (S.C., J.S.) Department of Environmental Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.

Local and systemic induced resistance to the root-knot nematodes (Meloidogyne incognita) in tomato by different doses of chemicals and its comparison with a biological control agent (Paenibacillus polymyxa). H.U. Khan and Y.H. Kim. Pakistan Science Foundation, Islamabad, Pakistan; and (Y.H.K.) School of Agricultural Biotechnology, Seoul National University, Suwon 441-744, Korea.

Cultural control of sclerotinia rot of carrot by lateral clipping of carrot canopy. C. Kora, M.R. McDonald, and G.J. Boland. Department of Environmental Biology, University of Guelph, Guelph, ON N1G 2W1, Canada; and (M.R.M) Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada.

Metabolic fingerprinting, using mass ions to discriminate diseases of potato.A.C. Kushalappa, L.H. Lui, A. Vikram, and B. Prithiviraj. Plant Science Department, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada.

Intensive crop rotations of canola and field pea in western Canada. H.R. Kutcher, D. Ulrich, and S. Brandt. Melfort Research Farm, Saskatoon Research Centre, Agriculture and Agri-Food Canada, P.O. Box 1240, Melfort, SK S0E 1A0, Canada; and (D.U., S.B.), Scott Research Farm, Saskatoon Research Centre, Agriculture and Agri-Food Canada, Scott, SK S0K 4A0, Canada.

Development and design of a marker based on polymerase chain reaction for the detection of Fusarium proliferatum isolates from field-grown asparagus.K. Labour, M. St-Arnaud, and S.H. Jabaji-Hare. Department of Plant Science, McGill University, 21 111 Lakeshore Road, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada; and (M.S.-A.) Jardin botanique de Montréal and Institut de recherche en biologie végétale, 4101, rue Sherbrooke Est, Montréal, QC H1X 2B2, Canada.

Use of acidic electrolyzed water for reducing populations of Xanthomonas campestris pv. vesicatoria on tomato seed and foliage. G. Lazarovits, P.A. Abbasi, and R. Earl. Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street, London, ON N5V 4T3, Canada.

One-carbon metabolism in response to biotic and abiotic stresses. W. Liu, Y. Wei, and J. King. Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK S7N 5E2, Canada.

Relative importance of storage conditions on development of postharvest carrot diseases. T. MacDonald, R.N. Markarian, C. Vigneault, and V. Toussaint. Horticultural Research and Development Centre, Agriculture and Agri- Food Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.

Involvement of antibiosis in the biocontrol of potato silver scurf by different bacteria. C. Martinez, J.-N. Simard, J. Labonté, R.R. Bélanger, and R.J. Tweddell. Centre de recherche en horticulture, Université Laval, Quebec, QC G1K 7P4, Canada.

Mycelial interactions between vegetatively incompatible Fusarium graminearum (Gibberella zeae)isolates.B.D. McCallum, A. Tekauz, and J. Gilbert. Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB R3T 2M9, Canada.

Latent infection and distribution of a hypovirulenceassociated double-stranded RNA (OnuMV3a) in populations of Sclerotinia homoeocarpa. M.S. Melzer, F. Deng, and G.J. Boland. Department of Environmental Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.

In vitro effects of salt compounds on radial growth, sporulation, and spore germination of postharvest potato diseases. A.A.S. Mills, H.W. Platt, R.A.R. Hurta, and R.A. MacPhail. Crops and Livestock Research Centre, Agriculture and Agri-Food Canada, 440 University Ave., Charlottetown, PE C1A 4N6, Canada; and (R.A.R.H.) Department of Biology, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.

Patterns of gene expression during infection of soybean by Phytophthora sojae. P. Moy, I. Atkinson, D. Qutob, and M. Gijzen. Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street, London, ON N5V 4T3, Canada.

Some factors involved in soil disturbance that reduces disease of wheat caused by Rhizoctonia solani AG 8. S.M. Neate. Department of Plant Pathology, North Dakota State University, P.O. Box 5012 Fargo, ND 58105-5012, U.S.A.

Comparison of epidemics caused by Pythium aphanidermatum and P. dissotocum in pepper plants grown in small-scale hydroponic trough systems. T.N. Owen-Going and J.C. Sutton. Department of Environmental Biology, University of Guelph, Guelph, ON N1G 2W1, Canada.

Molecular differentiation between Peridermium harknessiiand Cronartium quercuum f. sp. banksianae. F. Paradis, D.L. Joly, J. Walla, and R.C. Hamelin. Laurentian Forestry Centre, Natural Resources Canada, Sainte- Foy, QC G1V 4C7, Canada; and (J.W.) Plant Pathology Department, North Dakota State University, Fargo, ND 58105-5012, U.S.A.

Refining the protocols for screening of resistance of spring wheat to fusarium head blight under controlled conditions. M.P. Pradhan and J. Gilbert. Cereal Research Centre, Agriculture and Agri-Food Canada, 195 Dafoe Road, Winnipeg, MB R3T 2M9, Canada.

Effect of soil amendments on common scab of potato and soil bacterial communities. K. Prévost, B. Shipley, and C. Beaulieu. Centre d’étude et de valorisation de la diversité microbienne, Département de biologie, Université de Sherbrooke, Sherbrooke, QC J1K 2R1, Canada.

Volatile metabolite profiling of cultivars of onion differing in resistance to Fusarium oxysporum, Botrytis allii, and Erwinia carotovora subsp. carotovora. B. Prithiviraj, A. Vikram, and A.C. Kushalappa. Department of Plant Science, Macdonald Campus, McGill University, Sainte-Annede- Bellevue, QC H9X 3V9, Canada.

Effect of biological and nutritional factors on development of cylindrocarpon root rot on American ginseng. M. Rahman and Z.K. Punja. Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada.

Flax rust races – an important collection needs preservation. K.Y. Rashid. Cereal Research Centre, Agriculture and Agri-Food Canada, Morden Research Station, Unit 100–101, Route 100, Morden, MB R6M 1Y5, Canada.

Epidemiology of sclerotinia head rot in wild sunflower. K.Y. Rashid and G.J. Seiler. Cereal Research Centre, Agriculture and Agri-Food Canada, Morden Research Station, Unit 100–101, Route 100, Morden, MB R6M 1Y5, Canada; and (G.J.S.) Northern Crop Science Laboratory, Agricultural Research Service, United States Department of Agriculture, Fargo, ND 58105, U.S.A.

Use of bacteriophages for the management of soft rot of calla lilies caused by Erwinia sp. in closed irrigation systems. M. Ravensdale, T. Blom, J. Gracia-Garza, and A. Svircev. Department of Plant Agriculture, University of Guelph, Guelph, ON N1G 2W1, Canada; and (J.G.G., A.S.) Southern Crop Protection and Food Research Centre, Vineland Station, Agriculture and Agri-Food Canada, Vineland, ON L0R 2E0, Canada.

An epidemiological study of verticillium wilt of potatoes: host–pathogen interactions of various Verticillium spp. N. Robinson, H.W. Platt, L. Hale, and V. MacLean. Crops and Livestock Research Centre, Agriculture and Agri–Food Canada, 440 University Avenue, Charlottetown, PE C1A 4N6, Canada; and (L.H.) Department of Biology, University of Prince Edward Island, 550 University Avenue, Charlottetown, PE C1A 4P3, Canada.

Assessment of soil or compost suppressiveness to Sclerotinia sclerotiorum under growth chamber condition: correlations with laboratory and field assessments. G. Rousseau, S. Rioux, and D. Dostaler. Département de phytologie, Pavillon Paul-Comtois, Faculté des sciences de l’agriculture et de l’alimentation, Université Laval, Québec, QC G1K 7P4, Canada; and (S.R.) Centre de recherche sur les grains, Complexe scientifique, 2700, rue Einstein, Sainte-Foy, QC G1P 3W8, Canada.

A respiratory method to monitor soil or compost suppressiveness to Sclerotinia sclerotiorum under laboratory conditions. G. Rousseau and R. Schaefer. Département de phytologie, Pavillon Paul-Comtois, Faculté des sciences de l’agriculture et de l’alimentation, Université Laval, Québec, QC G1K 7P4, Canada; and (R.S.) Laboratoire d’écologie des sols tropicaux, Institut de recherche pour le développement, 32, avenue Henry Varagnat, 93143 Bondy CEDEX, France.

The Centraalbureau voor Schimmelcultures at the beginning of the 21st century. R.A. Samson and J.A. Stalpers. Centraalbureau voor Schimmelcultures, P.O. Box 85167, 3508 AD Utrecht, Netherlands.

Soils suppressive to Rhizoctonia solani AG 2-2IIIB in sugar beet in the Netherlands. J.H.M. Schneider and Y. Bakker. Institute of Sugar Beet Research, P.O. Box 32, 4600 AA Bergen op Zoom, Netherlands.

Soils suppressive to Rhizoctonia solani AG 2-2IIIB in sugar beet in the Netherlands. J.H.M. Schneider and Y. Bakker. Institute of Sugar Beet Research, P.O. Box 32, 4600 AA Bergen op Zoom, Netherlands.

Specific primers to detect Rhizoctonia solani AG 2-2IIIB in plant and soil. J.H.M. Schneider, E.M. Musters-van Oorschot, and S. Jabaji-Hare. Institute of Sugar Beet Research, P.O. Box 32, 4600 AA Bergen op Zoom, Netherlands; and (S.J.-H.) Department of Plant Science, McGill University, 21 111 Lakeshore Road, Sainte-Anne-de- Bellevue, QC H9X 3V9, Canada.

Culture collections: perspectives and problems. L. Sigler. Microfungus Collection and Herbarium, Devonian Botanic Garden, University of Alberta, Edmonton, AB T6G 2E1, Canada.

Evaluation of seedling resistance to leaf-spot diseases in wheat. P.K. Singh and G.R. Hughes. Department of Plant Sciences, University of Saskatchewan, 51 Campus Drive, Saskatoon, SK S7N 5A8, Canada.

Characterization of a metabolite produced by Mycosphaerella pinodes, a causal agent of ascochyta blight on field peas. H. Su, S.F. Hwang, K.F. Chang, S.F. Blade, G.D. Turnbull, and R.J. Howard. Alberta Research Council, Vegreville, AB T9C 1T4, Canada; (K.F.C.) Field Crop Diversification Centre, Alberta Agriculture, Food and Rural Development (AAFRD), Lacombe, AB T4L 1W1, Canada; (S.F.B.) Crop Diversification Centre North, AAFRD, Edmonton, Edmonton, AB T5B 4K3, Canada; and (R.J.H.) Crop Diversification Centre South, AAFRD, Brooks, AB T1R 1E6, Canada.

Assessment of endemic fungi as potential biological control agents of Rubus spectabilis in coastal British Columbia. G. Sumampong, S.F. Shamoun, and Z.K. Punja. Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC VSA 1S6, Canada; and (S.F.S.) Pacific Forestry Centre, Canadian Forest Service, Victoria, BC V8Z 1M5, Canada.

Enhanced phenazine biosynthesis and biocontrol activity by a Tn5 mutant of Pseudomonas aeruginosa PNA1 in the presence of exogenous tryptophan. J.T. Tambong and M. Höfte. Laboratory of Phytopathology, Ghent University, Coupure Links 653, B-9000 Gent, Belgium; (J.T.T.) present address: Department of Molecular Biology and Genetics, University of Guelph, Guelph, ON 1N1 2G1, Canada.

Correlations among components of fusarium head blight in Canadian barley. A. Tekauz. Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB R3T 2M9, Canada.

Pathogenic fungi isolated from discolored oat kernels in western Canada in 2002. A. Tekauz, N. Ames, B. McCallum, and J. Mitchell-Fetch. Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB R3T 2M9, Canada.

In vitro interaction between the wheat poly(A)-binding protein and P1 proteinase of Turnip mosaic virus. K. Thivierge and M.G. Fortin. Department of Plant Science, McGill University, 21 111 Lakeshore Road, Sainte-Anne-de- Bellevue, QC H9X 3V9, Canada.

Population of Xanthomonas campestris pv. vitians in relation to disease level and effect of lettuce leaf age on bacterial leaf-spot development. V. Toussaint, C.E. Morris, and O. Carisse. Horticultural Research and Development Centre, Agriculture and Agri-Food Canada, 430 Gouin Boulevard, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada; and (C.E.M.) Station de pathologie végétale, Institut national de la recherche agronomique, Avignon, France.

Blueberry anthracnose in British Columbia: causal organisms, weather requirements for infection, and disease control strategies. N. Verma, L. MacDonald, and Z.K. Punja. Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada; and (L.M.) British Columbia Ministry of Agriculture, Food and Fisheries, 1767 Angus Campbell Road, Abbotsford, BC V3G 2M3, Canada.

Disease discriminatory volatile metabolites from ‘McIntosh’ apple inoculated with fungal pathogens. A. Vikram, B. Prithiviraj, and A.C. Kushalappa. Plant Science Department, McGill University, Sainte-Anne-de-Bellevue, QC H9X 3V9, Canada.

Establishment of spatio-temporal development of late blight in potato tubers, using polymerase chain reaction. O. Wally, F. Daayf, L. Lamari, and L. Adam. Department of Plant Science, University of Manitoba, 222 Agriculture Building, Winnipeg, MB R3T 2N2, Canada.

Molecular detection of aster yellows phytoplasma in carrots and leafhoppers in Manitoba during 2001–2003. O. Wally, F. Daayf, A.H. Khadhair, M. Iranpour, L. Adam, B. Elliott, T. Shinners-Carnelley, P. Northover, and S. Keyworth. Department of Plant Science, University of Manitoba, 222 Agriculture Building, Winnipeg, MB R3T 2N2, Canada; (A.H.K.) Alberta Research Council, P.O. Box 4000, Vegreville, AB T9C 1T4, Canada; and (B.E., T.S.-C., P.N., S.K.) Manitoba Agriculture and Food, P.O. Box 1149, Carman, MB R0G 0J0, Canada.

Detection of pathogenic Streptomyces scabies causing potato scab, by multiplex polymerase chain reaction. A. Wang and G. Lazarovits. Department of Biology, Biological and Geological Sciences Building, University of Western Ontario, London, ON N6A 5B7, Canada; and (G.L.) Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, 1391 Sandford Street, London, ON N5V 4T3, Canada.

Molecular cloning and characterization of Blumeria graminis Lip1 gene: evidence of a secreted hydrolytic enzyme involved in obligate fungal pathogenesis. F. Wang, G. Selvaraj, and Y. Wei. Department of Biology, University of Saskatchewan, 112 Science place, Saskatoon, SK S7N 5E2, Canada; and (G.S.) Plant Biotechnology Institute, National Research Council of Canada, 110 Gymnasium Place, Saskatoon, SK S7N 0W9, Canada.

Impact of leaf-spot pathogens on alfalfa.H. Wang, S.F. Hwang, B.D. Gossen, K.F. Chang, G.D. Turnbull, and R.J. Howard. Alberta Research Council, Vegreville, AB T9C 1T4, Canada; (B.D.G.) Saskatoon Research Centre, Agriculture and Agri-Food Canada, Saskatoon, SK S7N 0X2, Canada; (K.F.C.) Field Crop Development Centre, Lacombe, AB T4L 1W8, Canada; and (R.J.H.) Crop Diversification Centre South, Alberta Agriculture, Food and Rural Development, Brooks, AB T1R 1E6, Canada.

The role of nitric oxide in conidial germination and appressorial development in Colletotrichum coccodes. J. Wang and V.J. Higgins. Department of Botany, University of Toronto, Toronto, ON M5S 3B2, Canada.

Differential gene expression of phenylalanine ammonia lyase and 3-hydroxy-3-methylglutaryl coenzyme A reductase in potato leaves infected with US1 and US8 genotypes of Phytophthora infestans. X. Wang and F. Daayf. Department of Plant Science, 222 Agriculture Building, University of Manitoba, Winnipeg, MB R3T 2N2, Canada.

Epidemiology of Blueberry scorch virus in British Columbia. L.A. Wegener, R.R. Martin, L.S. MacDonald, M.E. Sweeney, and Z.K. Punja. Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, BC V5A 1S6, Canada; (R.R.M.) Horticultural Crops Research Laboratory, Agricultural Research Service, United States Department of Agriculture, 3420 NW Orchard Avenue, Corvallis, OR 97330, U.S.A.; and (L.S.M., M.E.S.) British Columbia Ministry of Agriculture, Food and Fisheries, 1767 Angus Campbell Road, Abbotsford, BC V3G 2M3, Canada.

Severity of leaf blight in carrot is reduced by preplant application of nitrogen. S.M. Westerveld, A. McKeown, and M.R. McDonald. Department of Plant Agriculture, Crop Science Building, University of Guelph, Guelph, ON N1G 2W1, Canada.

Effect of a conditionally dispensable chromosome on rhizosphere colonization by the fungus Nectria haematococca MPVI. G.J. White and H.D. VanEtten. Department of Plant Pathology, University of Arizona, Tucson, AZ 85721, U.S.A.

Mitogen-activated protein kinase pathways and wheat defense response to leaf rust. T. Xing, D. He, J.A. Stebbing, M. Jordan, C. Rampitsch, W. Mauthe, T. Ouellet, and B. McCallum. Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB R3T 2M9, Canada; and (T.O.) Eastern Cereal and Oilseed Research Centre, Agriculture and Agri-Food Canada, Ottawa, ON K1A 0C6, Canada.

Mitogen-activated protein kinase pathways integrates multiple signals in biotic and abiotic stresses. T. Xing, J.A. Stebbing, T. Fetch, and J. Stratmann. Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB R3T 2M9, Canada; and (J.S.) Department of Biological Sciences, University of South Carolina, Columbia, SC 29208, U.S.A.

Mesophyll protoplast systems for high-throughput gene function analysis. T. Xing, J.A. Stebbing, and J. Menzies. Cereal Research Centre, Agriculture and Agri-Food Canada, Winnipeg, MB R3T 2M9, Canada.

Virulence of isolates of Fusarium spp. causing head blight in wheat. A.G. Xue, K.C. Armstrong, H.D. Voldeng, G. Fedak, Y. Chen, F. Sabo, and C. Babcock. Eastern Cereal and Oilseed Research Centre, Agriculture and Agri- Food Canada, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada.

Effect of seed treatments on productivity of different sizes of Phomopsis–Diaporthe-contaminated soybean seeds. A.G. Xue, E. Cober, T.R. Anderson, S. Rioux, R. Hall, and M. Morrison. Eastern Cereal and Oilseed Research Centre, Agriculture and Agri–Food Canada, 960 Carling Avenue, Ottawa, ON K1A 0C6, Canada; (T.R.A.) Greenhouse and Processing Crops Research Centre, Agriculture and Agri–Food Canada, 2585 County Road 20, Harrow, ON N0R 1G0, Canada; (S.R.) Centre de recherche sur les grains, 2700, rue Einstein, Sainte-Foy, QC G1P 3W8, Canada; and (R.H.) University of Guelph, Guelph, ON N1G 2W1, Canada.

Effect of mycorrhization on the accumulation of rishitin and solavetivone in potato plantlets. M.K. Yao, H. Désilets, M.T. Charles, R. Boulanger, and R.J. Tweddell. Centre de recherche en horticulture, Université Laval, Québec, QC G1K 7P4, Canada; and (M.T.C.) Centre de recherche et de développement en horticulture, Agriculture et agroalimentaire Canada, Saint-Jean-sur-Richelieu, QC J3B 3E6, Canada.

Polymerase chain reaction – denaturing-gradient gel electrophoresis method for assessing Fusarium diversity in environmental samples. E. Yergeau, M. Filion, V. Vujanovic, and M. St-Arnaud. Institut de recherche en biologie végétale, Université de Montréal, and Jardin botanique de Montréal, Montréal, QC H1X 2B2, Canada.